• Code: 480
• Description: ID sensor error
  The ID sensor is being calibrated (process control, step 1) While the LED is off, the output voltage is 0.5 V or lower.
• Causes: • Defective ID sensor • Defective circuit • Defective connector

• Code: 481
• Description: Transfer belt mark detection error
  • The main motor is operating or changes its speed. The lock signal is detected. The belt mark sensor signal is not detected for 0.2 second in normal speed mode or 0.4 second in half speed mode.
• Causes: • Defective main motor • Image transfer belt out of position • Belt mark blurred or absent

• Code: 503
• Description: 3rd tray error
  • The tray lift motor turns on. The top of the paper stack is not detected for 18 seconds. • The tray is set. The top of the paper stack is detected. The bottom plate is lowered. The stack detection is not cleared within 7 seconds. These steps are repeated 4 times.
• Causes: • Defective paper height sensor • Defective tray lift motor

• Code: 504
• Description: 4th tray error
  • The tray lift motor turns on. The top of the paper stack is not detected for 18 seconds. • The tray is set. The top of the paper stack is detected. The bottom plate is lowered. The stack detection is not cleared within 7 seconds. These steps are repeated 4 times.
• Causes: • Defective paper height sensor • Defective tray lift motor

• Code: 515
• Description: Duplex unit communication error
  • A connection error occurs. • The signal is sent from the copier to the duplex unit every 3 seconds while paper is not transported by the unit. However, the duplex unit does not respond within 5 seconds.
• Causes: • Defective duplex unit board • Defective BICU • Defective IOB • Defective connection (Main unit - Duplex unit)

• Code: 520
• Description: Fusing unit motor
  • The motor starts or changes speed. The lock signal does not continue for 1 second within a 3second interval. • The motor starts. The lock signal is detected and operation proceeds normally. The lock signal is interrupted for 1 second.
• Causes: • Defective fusing unit motor

• Code: 521
• Description: Paper feed motor error
  • The motor starts or changes speed. The lock signal does not continue for 1 second within a 3second interval. • The motor starts. The lock signal is detected and operation proceeds normally. The lock signal is interrupted for 1 second.
• Causes: • Defective paper feed motor

• Code: 530
• Description: Fusing fan motor error
  • The main power is turned on. The fusing fan lock signal is detected for 2 seconds. • The fusing fan is activated. The fusing fan lock signal is not detected for 2 seconds.
• Causes: • Defective fusing fan • Disconnected or broken harness of the fusing fan